The company, which also owns Cadbury, said the move was down to the rise in the cost of ingredients, and denied it was a result of Brexit.

In a statement on the Toblerone Facebook page, the company said: "We had to make a decision between changing the shape of the bar, and raising the price.

"We chose to change the shape to keep the product affordable for our customers, and it enables us to keep offering a great value product. it had to make a decision between changing the look of the bars or raising their price."

3. Maltesers

Bags of the chocolates appear to be 15 per cent lighter, and sold for the same price.

Mars told The Telegraph: “Like all chocolate manufacturers, we have seen the cost of raw materials rise and, while we try to absorb these pressures as much as possible, sometimes we have to make the difficult decision to reduce the size of some of our products so our consumers can continue to enjoy an affordable treat.

"Our focus is always on offering consumers our great tasting, high quality chocolate brands at the best value for money.”

"As well as the 780g tub pictured, we also have a 1.3kg tin available which lovers of Quality Street might like to try this Christmas.

"We want to give the best possible value for money and we believe that this product is still extremely competitive."

5. Cadbury Fingers

In 2015, the size of packs of Cadbury Fingers shrank by 11g, which equates to around two fingers, to a new weight of 114g,the Daily Mail reported.

Although labelled as a Cadbury product, Fingers are made under license by a Saint Albans-based company, Burton’s Biscuit Company. Over a billion of the biscuits, which were launched in 1951, are consumed in the UK every year.

In a statement, Burton's said that the new, smaller packs were rolled out last year "responding to consumer demand", along with a larger, 171g "sharing pack". The company said that the recommended price of the packs had been reduced from £1.99 to £1.79 - though it remains up to supermarkets if they adopt new pricing.

“We firmly believe that the variety of pack sizes for different occasions offer consumers the best value for money for a great quality product. Whilst we can’t comment on retailer pricing, our data shows that the price has significantly fallen since the introduction of the new sizes", a spokesperson said.

6. Creme Eggs

Michael Deacon doesn't like Creme Eggs

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Not only were Creme Egg fans dismayed when Kraft Foods stopped using Cadbury’s Dairy Milk for the shell, and instead started using a “standard cocoa mix chocolate", in 2015 they also reduced the number of Creme Eggs in a pack.

The size went down from 6 to 5.

A spokesman for Mondelez, Kraft's confectionery division, told The Sun: "It's no longer Dairy Milk. It's similar, but not exactly Dairy Milk. We tested the new one with consumers. It was found to be the best one for the Creme Egg, which is why we've used it this year.

"The Creme Egg has never been called the Cadbury's Dairy Milk Creme Egg. We have never played on the fact that Dairy Milk chocolate was used.”

7. Twix

In 2012, Mars, Inc. (who make Twix) announced a 250 calorie cap on all single-serve confectionary by the end of 2013. The result is that many of their products have now been downsized to meet these requirements. Twix have been cut down from 58g to 50g, marking a 14 per cent reduction.

8. Snickers

Another of Mars, Inc’s products, Snickers bars were cut down by 17 per cent, from 58g to 48g. Prices remained the same at roughly 51p, until they were raised to roughly 60p (except for Asda, who sell them for 45p).

9. Dairy Milk

Mondelēz restyled Cadbury Dairy Milk, and got rid of the block design in favour of ovals.

10. Freddos

Food conglomerate Mondelēz is due to hike the price by 20% as a "last resort" to "keep favourite brands on the shelf".

This comes after they controversially changed the shape of some Toblerone bars so they contain less chocolate for the same price.

A spokeswoman said: “Increasing prices is always a last resort, but to ensure we can keep people’s favourite brands on shelf and look after the 4,500 people we employ in the UK, we are having to make some selective price increases across our range.”